Gramophone and like machine



E. A. GRAHAM.

GRAMOFHONE AND LIKE MACHINE. APPLICATION FILED MAR. 22, I92I.

Patented Dec. 20, 1921.

3 SHEETS-SHEET I- E.A.GRAHAM. GRAMOPHONE AND LIKE MACHINE.

APPLICATION FILED MAR 2 l. 1,401,069. Patented Deu.l20, 1921.I

` l a SSSSSSSSS EU 2.

AE. A. GRAHAM.

GRAMoPHoNE AND UKE MACHINE.. f

APPLICATION FILED MAR. 22, 1921.

1,401,069. Patented nw. zo, 1921.

UNlTED STATES EDWARD ALFRED GRAHAM, Ol BROCKLEY, LONDON, ENG-LAND.

GRAIOPHONE 2ND 'LLE MAC-HINT);

ino-inse.

Specification of tette-mienne. atented Dec'. 20, 1921.

Application led March 22, 192i. Serial No. 454,429.

To all whom t may concern.'

Be it known that l, EDWARD ALFRED GRAHAM, a subject ot the King of Greatv Britain and lreland, residing at Brockley, in the county of London,r England, have invented Improvements in or Relating to Gramophones and like Machines, of which the following is a specification- The object of the present invention is to provide improved means for stopping and starting gramophones, phonographs, and like machines. l

According to the invention, the motor driven table or record carrying element is arrested by means of a brake pad or the like brought into contact with a brakedisk or equivalent device in connection with the motor of the machine. p

In a machine embodying the invention, a tone-arm carrying a sound reproducer and mounted to turn about a vertical axis, is provided with a` trip arm or projection which is adapted at a position intermediate oi the range oi angular movement of the tone-arm, to cause a brake lever to release the motor and allow the same to start, and toward each limit of its angular movement, to move latch mechanism and so permit the brake lever to act to stop the motor.

The brake lever, which is adapted to be depressed by the trip arm upon the tone-arm, carries a resilient pad or like member which, until the lever is depressed comes into contact with a disk or similar device connected to the governor spindle or other part of the motor thereby arresting` the drive of the inachine.

ln order that the nature of the said invention may be fully understood, reference will now be made to the accompanying drawings wherein Figure 1 shows in plan view, and more or less diagrammatically, partei1 a gramoplione or like machine with one construction of starting and stopping apparatus according to the invention and FiO. 2 is a perspective view showing parts of the said apparatus in a different position and to a larger scale.

Fig. 3 shows, more or less-diagrammatically, part of a grainophone or like machine provided with another construction of starting and stopping apparatus according to the invention, the brake lever beingV shown in its operative position. Fig. 4: is a similar view to Fig. with the brake lever in the inoperative position. Fig. 5 is a plan of the apparatus as shown in Fig. 4. Fig. 6 is a vertical section corresponding to the line lll- Vl of Fig. 5. Fig. 7 shows a socket in side elevation. Fig. 8 shows a modied form of socket.

ln the example shown in Figs. l and 2, the tone-arm 1 provided with a sound reproducer at its Vfree end, carries an adjust'- able trip arm 2, which, in the position shown in Fig. 2, engages the cam-like endc of a brake lever S, 3, pivote-d. at 8b, to the stationary top or table A of the machine, de-

pressing the arm 3 of the lever and elevating the other arm 8EL Aand a brake pad lat the end thereof out of Contact with the disk 5 oi' the motor governor 5a. The machine can now run but any further movement ofA the tone-arm outward into the position shown in Fig. 1, causes the trip arm 2 to engage with and press back one arm 6 of a stop lever 6-7 which is pivoted aft-6* on the brake:

disk 5 and stop the machine and hold the l machine stationary all the time the said reproducer and associated tone-arm are moved away from the record B (Fig. 1). 11 is a spring connected tothe arm 6` of the. lever 6*? and to the latch 8 and arranged to urge the latch 8 toward the brake lever 3 3a. Movin the tone arm playing, causes the trip arm 2, as soon as it reaches the rst described position (Fig.` 2) to depress the adjacent end of the levers 3, 8 by acting on its cam like end 3C, and enable the motor to start after 4which the arm 3 of the lever is maintained in the depressed position by the datent 9 under the acinward tol start' tion of the spring 11 until the tone-arm 1,

rl`liis lever being by hand to enable it to be operated byhand at the required time t0 suit the particular sound record B being used.

rIhe nrst mentioned latch operating member namely 6-7 maybe replacedby a mem ber mounted independently ozt the brake lever 3 3a and be adapted to be positively actuated in opposite directions by the trip device when the tone arm is moved into and from its outer inoperative position, and

when moved in one direction, will directly move the brakeV lever into its inoperative Y position and release the latch so that it can the said lever so as to leave the latter quite free from both the said lever and the latch. To this end, the trip device may consist of a pin extending horizontally from a tone arm and mounted to turn in a stationary socket and the said latch operating member bein the term ot a lever mounted to turn in a vertical plane about a pivot carried bythe socket. The second latch operating member and the latch to which it is adjustably and trictionally held may be re-V placed `by members mounted to slide hori- Zontally in a vertical plane adjacent to a bearing or abutment on the said socket and be/urged in a direction toward the brake lever byV a spring connected to the latch member and to a lixed point, which may be on the said socket. Y

Figs. 3 to 7` inclusive, show starting and stoppingapparatus thus modied. ln this example, 3, 3a is the brake lever, 8 the latch carrying` a detent 9a adapted to hold the said lever in its inoperative position, (Sil- 7a the rst latch operating member, l2n the 'second latch operating member and 2a the trip device carried by the tone arm l.` The latter is swiveled in a soclret vle which fixed in a tubular holderll (Figo) secured to the stationary table 16 ot the machine.

The brake lever 3, 3n is pivoted to the stationary table A Aat 1.7 and is provided with 'Ya coiled spring 18 adapted to raise its arm 3 and to depress its other arm 3a and move a brake shoe la carried thereby into contact with the brake dislr 5 connected to the governor 5a of the motor used to rotate the record carrying turntable, which is not shown, but will as usual be above the stationary table A. The brake shoe may conveniently be carried by a vertical pin 19 fixed to a longitudinally adjustable end portion 3d ofthe bralre lever 3-4-3a and be fitted with a sleeve 2O where it extends through a hole .16a in the table A.

The latch 8a. and its operating member l2a are slotted' at.2l and 22 respectively f for the reception ot screws 23 by whichthey are connected to an abutment 24g (Fig. 5)

arranged in the path oi the trip devicewhich is constituted by a pin 2a extending ylaterally and horizontally from the tone arm l. The member l2a is endwise adjustable on the latch 8a against the action'of the spring 25, to vary the position of the eX- tension l2b to suit the length of a sound record to be played. 26 is a spring conf nected at one end to the latch a and at the other end to the socket ldand adapted to urge the latch toward the adjacent raised end portion 3 'of the brake lever 3-3a. rEhe detent 9u carried by the latch 8a and adjacent to the brake lever, is notched at 9b to admit of its overlapping` the end portion 3c of the brake lever (see Fig. a) when the same is, depressed. The latch 8a is provided with an inclined cam surface at 8b.

The latch operating member tlm-4l consists of a flat lever pivoted on a horizontal pin 27 liXed to an extension 28 of the socket 14:, so that it can turn in a vertical plane. lts end 6d is adapted to be directly moved in opposite directions by the tripl device 2EL in order to cause its other end 7a respectively to depress the adjacent arm 3 ot the brake lever 3--3a and to release such arm. The upper ,edge of the end 7a ot the said lever is arranged to workbelow the inclined cam surface 8l of the latch 8a. rlhesaid lever is formed with a slot 6b through which extends Va motion limiting screw 29,'and with a slot 6. l

The tone arm l is connected by a ball and socket joint 30 (Fig. 6) in knownV way to the socket let and is acted upon Vby a spring that tends normally to tilt the tone arm into a raised josition, thus acting; aga-inst the weight ci the sound reproducer 3l. (Fig. l.) The spring may, as shown in F1 es., 5 and 6, conveniently be a coiled spring carried by a pin 33 mounted in l earrng' 34 forming part of -a vertical 'l' shapedrnem# ber35 lined in atubular portion lll-il oii a vertical diametrically arranged cross piece forming part of the socket lll. rlhe two ends 32eL of the` spring 32 act against the top of the bearing 3a while an intermediate looped portion 32b ot the syncingv bears against `the bottom edge or the tone arm Vl Vat its forward side. (Fig. 6.)y

'operating lever 6a 7 acting against the inclined cam suri'ace 8b oit suclilatch 8, and' release the motor and also to release the latch 8a and enable the notched end of detent 9'DI of the latter to overlap the raised end portion 3C of the lever and hold the lever in its inoperative position, whereupon the playing of a record can be commenced, and the tone arm thereby caused to move in the direction mentioned. llVhen the playing of the record is finished, the trip pin 2a, by acting against the extension 12b orf the member 12a, will draw back the latch 8fL from the brake lever 3---3u which will then be moved into its operative position under the action.

of its spring 18, to stop the motor and'record carrying turntable and slightly raise the arm 7 of latch operating lever 6'd 7'. Vhen the tone arm 1 is moved back into the position shown in Fig. 3, the trip pin 2a will slide over the end 6a of the lever (ia 7"1 and act to raise the end 7a so as to cause the latter, by acting against the inclined surface 8b on the latch 8, to move back such latch into its inoperative position, and will linally drop into the slot 6 in the lever 6a 7iL so as to hold the tone arm in its outer and inoperative position and leave the brake lever 3, 3fL free from the latch 8l and lever (ia-7a. The swivel mounting of the tone arm permits the trip pin 2a to rise over the forward side of the arm 6L of the lever 7a and fall into the slot 6 therein.

A portion of the'upper edge of the socket 14 may advantageously be shaped in the manner shown in Figs. 3, 4l and 7 to form a notch 3,6, having cam like end surfaces 36@ 36" and supplementary notches 37 and 38 for the reception of the trip pin 2a The arrangement is such that when the tone arm 1 with attached sound reproducer is turned into its outer inoperative position, shown in Fig. 3, the pin 2a will ride up over the cam surface 36a and act against the arm 6e of the lever 6a 7a to raise the end 7 of such lever as described and then enter the notch 37 and be held against the bottom thereof by the weight of the sound reproducer on the tone arm, the latter being thus held in a raised inoperative position, as for instance during the changing of a sound record. l/Vhen the tone arm is moved in the opposite direction, it will, by acting against one side of the notch 37 depress the end 7a oi the lever as hereinbefore described for the purposev set forth. "When the tone arm is afterward being moved into its innermost position, the pin 22L will ride up over the cam surface 36h and enter the notch 38 against the bottom of which it will firmly be heldV by the weight oi' the sound reproducer with the tonearm in a raised and inoperative poition suitable for the transport of the machine i'from place to place,` The pin 2a' will be moved upward against the lower face of the hook at 39 by the action of the coiled spring 3Q, when the sound reproducer is removed from the tone arm.

According to the modification shown inv Fig. 8, the cam surfaces 36a, 36h, seats 37 and 38 and hook 39 are vomitted and the socket lllis formed with a recess of the shape shown at l0 for the trippin 2a to workin. In this case the latch operating lever 6t-7l is formed with a rounded lprojection as shown at 6d to admit of its being operated in one direction by the trip pin 2a to depress the end 7 f* of the said lever, and the tone arm instead of being mounted t0 swivel about a universal joint, as hereinbeitore described, is mounted to turn only about a vertical axis in the ordinary way and is provided, in known manner, Vwith a jointed tube or goose neck to carry the sound reproducer.

1. In a gramophone or like machine, the combination with a movable device driven from the gramophone motor and an angie larly movable tone arm, of a trip device carried by said tone arm, a spring controlled brake lever adapted, when released, to arrest said movable device and motor, a latch member adapted when in its operative posi` tion to hold said lever in its inoperative position, and two latch operating members arranged to be actuated by the trip device when moved into its limiting angular positions with the tone arm, each latch operating member when so operated, acting to cause the latch member to release the said lever.

2. A gramophone or like machine having starting and stopping mechanism according to claim l, wherein the latch member is normally urged toward the brake lever and one of the latch operating members is adapted, when the trip device is being moved Jfrom its outer limiting position, to move the brake lever into its inoperative position and permit the llatch member to hold it in that position.

3. A `gramophone or like machine according to claim 1, wherein the latch operating member that is actuated by the trip device when nearing its inner angular limiting position, is adjustablyconnected to the latch member. .A -v 4. In a gramophoneor like machine, the

combination with a movable device driven from the gramophone motor and an angu-` larly movable tone arm, of `a trip device carried by the tone arm, a spring controlled izo lio

ranged to be actuated by the trip device when nearing its inner angular limitingposition and tothen withdraw the latch meinber from the brake lever.

5. ln a gramophone or lilre machine, the combination with a movable device driven from the gramophone motor and an angularly movable tone arm, olf a trip Vdevice carriedby said tone arm, a brake lever adapted, when released, to engage said movabie device and arrest the motor, a vertical socket ywherein the inner end o the tone arm can turna latch member arranged to slide in a vertical plane against said socketand provided" with aV detentadapted to engage one endof said brake lever when depressed and to khold the lever in the inoperative position, a latch operating ,lever mounted on said socket to turn in a vertical plane above the said end of the brake lever and adapted'to be moved by the trip device, on the outward movement thereof, in a direction away from said end of the brake-lever and to disengage the detent therefrom and allow the brake lever to move into its operative position, and wliencaused to move in the opposite directiton, upon movement of the trip device in an inward direction, to depress said end of the brake lever and allow the detent to engage it andfhold the brake lever inthe inoperative position, and a second latch operating member adapted to be moved by the trip device, when nearing its inner position, and to then move the latch member and detent into the inoperative position to release the brakel lever. Y

6. ln a gramophone or like machine, the combination of a motor driven member, a bralre lever adapted automatically, when released, to arrest said member and motor,

a fixed socket, a tone arm angularlymovable in said socket, a trip pin extending laterally from said tonearm, a spring actuated latch member with detent adapted automatically to engage said end otthe lever when 4depressed, a latch ,operating member connected tos-aid latch member and adaptedV to be engaged by said trip pinwhen nearing the inner end of its angular movement with the tone arm andto then withdraw the latch member and detent from the brake levera Vlatch operating lever pivoted to said socket so as to oscilla-te above said end oit the brake lever vand to be operated by said trip pin when the same is moved into and from its outer limiting angular position, the outward movement ot the pin causing the latch oper-l in said socket, a trip pin extending laterally from said tone arm, a latch with detent and latch operating member both in the form ot dat plates frictionally held together and moui'ited'to slideon said soci-ret and to be moved away from one end Voit the brake lever Y,

by the trip pin, and a latch operating lever pivoted to said socket above said end of the brake lever and adapted to be turned in opposite direction by said trip pin, movement of said latch operating lever in one direction releasing the brake lever and moving the latch and detent into theinoperative position and movement in the opposite direci .tion moving the brake lever into its inoperative position and then allowing the latch and deteiit to'move into their operative positions to hold the brake lever in the inoperative position.

8. ln Va gramophone or likemachine, the combination with a motor driven member, a bralielever adapted automatically, when released, toarrest said member and motor, a stationary socket, a ytone arm swiveled iii said soclret,`a spring acting in a oirection on said tone arm, tending to lift its outer 'tree end, said socket being formed at its upper edge with a recess having at each end thereot' a. cam surface and a suppleinentarj,7 notch with seat and above one of said notches and seats a hook, a trip pin arranged to travel in said recess and over the cam surfaces and into the notches, a spring actuated latch member mounted `to slide on said socket toward and from said brake lever and thereby' o" respectively hold and release said lever,v

pivoted to said socket and adapted Vto be operated by said. trip pin when moving into ,Y

its outer angular limiting,r position, said pin then sliding over the achacent' cam surface and moving the pivoted latch operatingmember in one direction to move ythe latch member into its inoperative position and pei-mit the balie lever to move into its operative position, the pm then entering the slot in the said slotted lever and coming torest on the Seat at the bottom of the come Sponding notch in the socket, the pin when moved in the opposite direction acting to move the slotted lever in the opposite direction to move the brake level` into its inopera- EDWARD ALFRED GRAHAM. 

